c9c2a2bd16
This allows tooling to get a string describing the context of a particular offset into the file. This is used, for example, to provide context above the source code snippets in console-printed diagnostic messages.
42 lines
745 B
Go
42 lines
745 B
Go
package zclsyntax
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
)
|
|
|
|
type navigation struct {
|
|
root *Body
|
|
}
|
|
|
|
// Implementation of zcled.ContextString
|
|
func (n navigation) ContextString(offset int) string {
|
|
// We will walk our top-level blocks until we find one that contains
|
|
// the given offset, and then construct a representation of the header
|
|
// of the block.
|
|
|
|
var block *Block
|
|
for _, candidate := range n.root.Blocks {
|
|
if candidate.Range().ContainsOffset(offset) {
|
|
block = candidate
|
|
break
|
|
}
|
|
}
|
|
|
|
if block == nil {
|
|
return ""
|
|
}
|
|
|
|
if len(block.Labels) == 0 {
|
|
// Easy case!
|
|
return block.Type
|
|
}
|
|
|
|
buf := &bytes.Buffer{}
|
|
buf.WriteString(block.Type)
|
|
for _, label := range block.Labels {
|
|
fmt.Fprintf(buf, " %q", label)
|
|
}
|
|
return buf.String()
|
|
}
|